Intercooler.



PATENTED SEPT. 8, 1908.

F. D. HOLDSWORTH.

INTERGOOLER.

APPLICATION FILED SEPT.9,1907.

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FRED n. HOLDSWORTH, or ()LAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, or ULAREMONT, NEW HAMPSHIRE, A conromvrion or MAINE.

INTEBCOOLER.

Specification of Letters Patent.

Patented Sept. 8, 1908.

To all whom it may concern.

Be it known that I, Fun I). l IOLDSWORTJI,

a citizen of the United States, residing at Claremont, in the county of Sullivan and State of New Hampshire, have invented an Improvement in Intcrcoolers, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the rawings representing like parts.

. This invention relates to intercoolers, more particularly intended for cooling the air in air compressors or the like.

y In order that the principles of the invention may be clearly understood, I have shown a single type or embodiment thereof in th accompanying drawing, wherein Figure 1 is a vertical central sectional view of an intercooler embodying my invention; Fig. -22 is a transverse section upon the line 22 of Fig. 1; Fig. 3 is a transverse section g. 4 is a transupon the line 33 of Fig. 1 Fi verse section upon theline 44 of Fig. 1;

and Fig. 5 is a detail in vertical section showin the referred manner of securing the tu es an of sup orting the baflie plates.

Referring to t e single type or embodiment of the invention herein illustrated, the

shell of the intercooler is represented at 1, it being of any suitable material, such as cast iron, and is bolted or otherwise secured to the base 1. Such shell is preferably of a generally cylindrical form, one end thereof being provided with a preferably cast iron head 2, the top plate 3 whereof may be secured thereto as by bolts 4. The said head may be secured to the shell in any suitable manner as by bolts 5. The shell is provided with an inlet 6 for the medium that is to be cooled, which, in the present type of the invention, is air. A suitable outlet 7 is provided for the air, preferably at the opposite end of the shell. Herein said inlet and outlet are disposed upon opplosite sides of the shell. Depending from t e head 2 is a series of metalie pipes preferably of copper, the pipes being securedinthe said head inanysuitable manner and preferably by expanding the ends thereof, as indicated at 9in Fig. 5 into intimate engagement with correspondingly shaped 0 enings 10 in the cast iron head. Any suitablb number of such pipes may be provided. As

shown at 11 in Fig. 1', an inlet is provided in the head 2 for a cooling medium, which may be water. An exit for the wateris indicated at 12, it preferably being provided in the head 2 at a point oppositely disposed from the inletll. Preferably a transverse partition 13 is formed in the-head 2 to compel the desired circulation of the water through the tubes 8. In order to provide for free expansion or contraction of the copper tubes 8, the lower ends thereof are not-secured to a fixed portion of the casing or a fixed head, but are mounted in any suitable manner in a lower head 14, as by expanding the lower ends of said pipes thereinto in a manner similar to that indicated in Fig. 5. The said lower head is hollow and is provided with a drain ing pipe 15 passing through a stufling box 16, the construction being such as to permit movement of the lower head 14 and the drain pipe 15 toward and from the head 2, due to the contraction and expansion of the coppertubes 8. The pipe 15 may, if desired, be provided with a suitable valve to control the drainage of Water from the tubes 8.

I The tubes 8 are of any suitable diameter and are disposed in a number of rows or series, as clearly indicated in Figs. 2, 3 and 4, the pi es of each row preferably being arrange staggering with reference to those of the adjacent rows as clearly indicated. Preferably also the pipes are arranged closely adjacent each other. The bafile plates 17 are provided, as indicated in Fig. 1, preferably extending alternately from opposite sides of the casing 1 to compel the air or other fluid that is to be cooled to partake of a circuitous course in assing from the inlet 6 to the outlet 7. Whifd the baflie plates may be positioned and secured in any desired manner, herein I provide tie rods 18, clearly indicated in Fig. 1 and 5, extending from the head 2 to the lower baffle plates. In order to space and support the various plates, tubes 19 are provided of proper length and surrounding the tie rods, each baffle plate 17 being supported between adjacent tubes 19, as clearly indicated in Fig. 5.

By the described construction, the air is forced to take a sinuous course between the staggered tubes, thus breaking the air up into thinstrearns and causing every portion, thereof to come into actual contact with the cold surfaces of the pipes. In order effectually to cool heated air, it-is necessary to bring each portion thereof into actual contact with the cooling medium, as air parts very slowly with its heat by direct radiation.

The baffle plates increase the distance traversed by the air and cause it to strike against the tubes 8 squarely or approximately at -right angles respectively t rou hout the may be con ably mounted a condensing upon the exterior of the tubes or with a hand hole 24 having length of the tubes, so that the fu 1 effective force of the cold water or other cooling medium is received by the air.

Preferably the lower portion of the casing 1 is enlarged, as indicated at 20 in Fig. 1, so that the velocity of the descending air is reduced, thus ivin time for moisture that d ensed from the air upon the tubes or the interior of the casing and hence discharged int j be bottom of the casing, from being swept out at .the outlet by too rapid a current. Preferably the ,upper portion of the shell is made of as-small a diameter as possible consistent with assembling in order to keep the air inv intimate contact with the tubes. The casing 1 is closed at the lower end by a (plate 21, wherein is preferrain pipe 22 whereby water elsewhere may be drained from the casing.

In order to prevent the air as it enters the enlarged ortion 20 of the casing from passing direct y into the outlet 7, I have provided a deflecting plate 23 herein represented as semi-circular in form. Preferably the lower enlarged portion of the casing is provided a covering plate 25. If desired, a safety va sure gage 27 may be provided in conjunction with the intercooler.

Water or other cooling medium may be entered under pressure throu h the "inlet pipe 11 and passes down throug the tubes 8 arranged at the right hand side of the partition 13, viewin Fig. 1, thence rising through the tubes 8 at t e left hand side of the parti-r tion 13, viewing said figure, and is dischar ed throu h the outlet 12. It is apparent t at the et and outlet passages 11 and 12 may be arranged at any'desired point with relation to eachother.

Having thus described one type or embodiment of my invention, I desire it to' be un-- derstood that although specific terms areemployed they are used in a generic .and def 5. An intercooler comprising a caslngprovided with inlet and outlet openings 6 and scriptive sense and not for pur oses of limiowing claims.

tation the scope of the invention being set;

forth in the fol Claims. 1. An intercooler for compressors or the like comprisinga casing having inlet and out' let passages for the fluid to be cooled, a head said tubes are secured, said second head heve 26 and a pres of tubes extendin ceases head and extending therefrom lon itudinally of said casing, a head to which t e o osite ends of said tubes are secured, said ead being unconfined to permit expansion and contraction of said tubes and means uarding the outlet 0 ening for the fluid to %e cooled and compel ing a circuitous circuiatipin of said fluid about the last mentioned 3. An intercooler comprising a casing 1 having inlet and outlet passages 6 and 7 for the fluid to be cooled, a head 2 having inlet and outlet passa es 11 and 12 for the coolin medium, a stac of pipes extending from said head, a head 14 to which the opposite ends of said pipes are secured, said head 14 being unconfined laterally and longitudinally, thereby to permit expansion and contraction of the tubes means guardin the .outlet opening for the fluid to.-be coole and com elling a circuitous circulation of the flui and a draining tube 15 for the head 14. 4. An intercooler for compressors or the like comprising a casing havin inlet and outlet passages 6 and 7 for the fluld to be cooled,

a head 2 at one end of said casing having an inle t passage 11 for'the cooling medium, a...

stack of ipes extending from said head lon.- gitudina y'of said casmg, means extending transversely of said casing and intermediate the inlet and outlet openings to direct the medium to be cooled m a path at substantially right angles to the tubes and means guarding the-outlet passa e7, thereb compelling'the fluid to be coo ed to parta e of a circuitous path about the adjacent portion of the stackof tubes.

7, a head having an inlet opemng 11 a stack from said head substantially longitudina y of said casing, bafile plates 17 to compel the fluid to be cooled to partake of acircuitous route in passing from the inlet to the outlet openin the exit end of the casing being provide with an enlarged chamber and a deflecting plate in such enlarged chamber guarding the-outlet 7.

'6. An intercooler for compressors or the like comprising a casing 1 having inlet andoutlet openings 6 and 7 for the fluid to be cooled, the end of the casing adjacent the outlet opening being ofenlarged diameter, a

head 2 at one'end of the casing havinginlet and outlet pipes 11 and 12 for the cooling medium, a stack of tubes extending from the head 2 into the enlarged portion of the casing, a head 14 in said enlar ed portion to which the 0 posite ends of said tubes are secured, and aflle plates 17 extendin transversely of the casing 1 intermediate t e inlet and outlet openings 6 and 7. 4

7. An intercooler for compressors or the like comprising a casing 1 having inlet and outlet openings 6 and 7 for the fluid to be cooled, a head 2 having a pipe 11 for the entrance of the cooling medium, a stack of tubes extending from said head 2, a head 14 to which the o )posite ends of said pipes are secured, said cad being otherwise unconfined, means to compel a circuitous circulation about said head tie rods 18 extending from said head2, and bafile plates 17 supported by said tie rods.

8. An intercooler for compressors or the like comprising a casing 1 having a chambered head 2 provided with a partition 13, inlet and outlet pipes 11 and 12 u on opposite sides of said partition, a stac of tubes depending from the head 2, a head 14 to which the opposite ends of the pipes are secured, said head being unconfined to permit expansion and contraction of said tubes, tie rods extending longitudinally of said casing, and baffle plates 17 supported by said tie rods.

9. An intercooler for compressors or the like comprising a casing 1 having inlet and outlet openings 6 and 7 for the fluid to be cooled, ahead 2 mounted upon one end of the casing, said head being chambered and provided with a partition 13, inlet and outet pipes 11 and 12 for the cooling medium, a stack of tubes depending from said head 2, a head to receive the opposite ends of said pipes, tie rods extending longitudinally of said casing, baffle plates 17 extending transversely of said casing, and tubes mounted upon said tie rods to support said bafile p ates. I

10. An intercooler for compressors or the like comprising a casing 1 having inlet and outlet passages 6 and 7, a chambered head 2 having an inlet ipe 11, a stack of tubes depending from said head, the lower portion of said casing being enlarged to permit I'BdllC". tion in velocity of the fluid to be cooled, and apartition 23 partially encircling the lower ends of said tubes at said enlarged portion of the casing.

,11. An intercooler" comprising a casing 1 having inlet and outlet passages 6 and 7 for the fluid to be cooled, a chambered head 2- having a partition 13 therein and inlet and outlet pipes 11 and 12 upon opposite sides of said partition, a stack of tu es dependin fromthe lower portion of said chambere head, said pipes being substantially equally distributed upon opposite sides of said artition, the casing 1 aving an enlarged ower end, a chambered head to which the lower ends of the pipes are secured, a portion of the wall of the casing above the enlarged end be.- ing extended into the enlarged end to aiiord a partition 23 partially encircling the depending tubes adjacent the outlet opening, and baflie plates 17 intermediate the inlet and outlet openin s. v

12. An intercoo er comprising a head provided with inlet and outlet 0 eni'ngs at opposite end portions, a head aving an inlet opening, a stack of tubes extending from said heads substantially longitudinally of the casing, baffle plates extending transversely of said tubes to compel the fiuld to be cooled to partake of a circuitous route in assing from the inlet to the outlet opening, t e casing being provided adjacent the outlet opening with an enlarged chamber into which the tubes extend, said chamber being provided with a late guarding the outlet opening and compe ing a circuitous route of the fluid "to be cooled.

13. An intercooler comprising a casing provided with inlet and outlet openings at opposite erid portions, a head havingan inlet opening, a stack of tubes extending from said head substantially longitudinally of the easing, bafiie plates in said casing arranged transversely of the tubes, the casing being provided with an enlarged chamber adjacent the outlet, and a second head to which the opposite ends of said pipes are secured, said second head and a portion of the tubes leading thereto being arranged in said enlarged chamber whereby a circulation about said hegd and said portion of the tubes is permitte 14. An intercooler comprising a casing provided with inlet and outlet openings at opposite end portions, a head having an inlet opening, a stack of tubes extending rom said head substantially longitudinally of the cas.

ing, baflie plates in said casing arranged transversely of the tubes, the casing being provided with an enlarged chamber adjacent the outlet, a second head to which the opposite ends of said pipes are secured, said secname to this specification, in the presence of two subscribing witnesses.

FRED D. HOLDSWORTH.

Witnesses:

CHARLES F. DEMONT, E. J. BURCHARD. 

